Tools to generate images of various types of "tactile acuity charts" used primarily in research to measure tactile finger sensitivity and discrimination capabilities.
Currently included charts are:
- Legge et al.'s "Landolt C" chart
- Legge et al.'s "Dot" chart
Each tool generates two .PNG files in the current/working directory containing the printable chart contents. One of the charts (_labelled.png) has text labels on each line for identification purposes.
Simply run PHP from the command line to generate the chart.
$ php make_dot.php
$ php make_landolt.php
- Tested with PHP 7.0.32
- Requires that GD be available to PHP
This project is licensed under the GPL v3 License. See LICENSE.md for details.
The GNU Free Font is included for labelling.
Legge, G. et al. (2008) Retention of high tactile acuity throughout the lifespan in blindness. Perception & Psychophysics, 70(8): 1471-1488. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3611958/
Bruns, P. et al. (2014) Tactile acuity charts: A reliable measure of spatial acuity. PLOS ONE 9(2): e87384. https://doi.org/10.1371/journal.pone.0087384